Back in 2005, before the News Feed launched, Facebook was essentially just a collection of disconnected profiles.

Check out Mark Zuckerberg's profile in 2006.

Facebook launched the News Feed to display all your friends' activity in a single timeline in 2006.

At the same time, Facebook introduced the Mini-Feed. But the entire concept of a News Feed resulted in some very public outrage. Some users even went so far to call one of Facebook's product managers the devil.

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In 2009, Facebook's home page got a facelift. It started to creep onto Twitter's territory with the addition of a real-time News Feed. That same year, Facebook also introduced its algorithm for determining the order in which status updates should be displayed.